Dr. Seuss, the beloved children's author who died in 1991, will have a new book published from a manuscript and accompanying sketches recently rediscovered by his wife.

"What Pet Should I Get?" will be published on July 28, said Barbara Marcus, president and publisher of the Children's Division of Random House, and Susan Brandt, president of Dr. Seuss Enterprises, in a news release about the new book.

It's believed that Ted Geisel, better known as Dr. Seuss, wrote and sketched many of the pages of the book between 1958 and 1962. The pages of text and sketches were found in a box shortly after his death in 1991 by his wife Audrey Geisel while their home was being remodeled, said the release.

The material, though, was set aside and then rediscovered in 2013 by Mrs. Geisel and Dr. Seuss's longtime secretary and family friend Claudia Prescott as they were cleaning out his office space.

"While undeniably special, it is not surprising to me that we found this because Ted always worked on multiple projects and started new things all the time – he was constantly writing and drawing and coming up with ideas for new stories," said Audrey Geisel. "It is especially heartwarming for me as this year also marks 25 years since the publication of the last book of Ted's career, 'Oh, the Places You'll Go!'"

"It is shaping up to be a summer of great authors' previously undiscovered manuscripts making it to print," wrote Calia. "Earlier this month, the literary world was stunned to hear that a new Harper Lee novel is on the way. Now, it's Dr. Seuss's turn."

"Dr. Seuss's works are perennial bestsellers. Sales of his books usually surge in the weeks leading into the annual Read Across America event, which is celebrated on the author's birthday, March 2," he wrote.

USA Today reported that the new Dr. Seuss material will be kept at the University of California-San Diego with the rest of the Dr. Seuss Collection.